For the sake of illustration, we have also developed two examples of UV completed models featuring this mechanism [1]}. Specially interesting is the \(Z_{\mathcal {N}}\)  KSVZ model, which is shown to enjoy an improved PQ quality behaviour in large regions of the parameter space, depicted in solid orange lines in Fig. (REF ), see e.g. Refs. [2]}, [3]} for alternative solutions to the PQ quality problem.
